﻿//写cookies 

function setCookie(name, value) {
    var Days = 30;
    var exp = new Date();
    exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);
    //exp.setTime(exp.getTime() + 30 * 60 * 1000);
    document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
}

//读取cookies 
function getCookie(name) {

    var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");

    if (arr = document.cookie.match(reg))

    return unescape(arr[2]);
    else
        return null;
}

//删除cookies 
function delCookie(name) {
    var exp = new Date();
    exp.setTime(exp.getTime() - 1);
    var cval = getCookie(name);
    if (cval != null)
        document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString();


}



//}
////这是有设定过期时间的使用示例：
////s20是代表20秒
////h是指小时，如12小时则是：h12
////d是天数，30天则：d30
//setCookie("name", "hayden", "s20");